You may also consider a "ADA Toilet Spacer" which will give you the flexibility to use your existing equipment, but there are several companies that offer you a new toilet, if you wish. The major companies... i.e. Kohler, American Standard, Crane, Acorn etc. all have 18".
They vary depending on manufacture. Compromise to fit as many people as possible. We are designed to go squating. To tall of a toilet would make it more difficult. Taller toilets are made to aid elderly and physically challenged people to use toilet.
18 inches
The average size of a toilet is 21-30 inches wide, 14-16 inches from bowl to rim, and has a depth of 27-30 inches.
The width of a toilet tank can vary in size. The average width of a toilet tank is about 18 inches.
30 inches.
Medical supply places should have them.
Either on the left or right, 26 inches off the floor and 8 to 12 inches forward from the front of the toilet bowl. Reference: http://www.ehow.com/info_8027723_proper-placement-toilet-paper-holder.html
According to the 2006 International Plumbing Code, the following are the minimum dimentions for setting a toilet: From rear wall to center of drain line = 12 1/2 inches min. (General Standard Not Code) From side wall or side cabinet to center of drain or centerline of toilet = 15 inches min. From front of toilet to front wall or cabinet = 21 inches min. From front of toilet to Toilet dispenser = 7 to 9 inches. I hope you find this usefull. Terry
36 inches
Code minimum 15" to center of toilet from side wall.
Depends on the toilet being purchased, but generally 12 inches from the wall to the center of the toilet flange for a residential toilet.
15 inches from outside edge of tub to center of toilet flange.